Fiskeriets Hus ("The House of Fishery") is an attraction in the small fishing village/surfing resort of Hvide Sande at the Danish west coast. It's mostly a museum for local history, especially fishery and shipping, but it also features a small aquarium in the basement with 32 tanks and (based on my observation) around 50 species. Most of the species are Danish saltwater fish/invertebrates, but they also have a few fish species from the rivers and brooks around Hvide Sande.
The aquarium is very "independent" - all of their fish are wild-caught or bred by themselves, and they don't really cooperate with other aquaria and zoos. They do have a zoo license, though, and the fish generally live in acceptable conditions, if nothing special (the same standards as all of the other small Danish coast aquaria).